PBSI 301 - EXAM 1 questions and
answers already passed
Which of the following techniques is used to generalize findings from the sample to the
population?
inferential statistics
What is the foundation of inferential statistics?
probability
Inferential statistics is based on the idea that the ______.
sample is representative of the population
The group you wish to generalize your results to is called the ______.
population
A representative sample allows you to generalize your results to a ______.
larger population
A sample is best defined as ______.
,a smaller group selected from a given population
Which of the following statements is TRUE of the normal curve?
Group of answer choices
Mean, median, and mode are the same.
The fact that the tails of a normal distribution never touch the horizontal axis relates to ______
property.
asymptotic
What is a sampling distribution in statistics?
The distribution of a statistic (e.g., mean or variance) calculated from multiple random samples
taken from a population.
What is the standard error in statistics?
A measure of the variability in a statistic due to random sampling.
When you collect a larger sample, the tendencies of the sample will:
Become more similar to those of the population
What does the Central Limit Theorem state in statistics?
,It states that as the sample size increases, the sampling distribution of the sample mean
approaches a normal distribution, regardless of the shape of the population distribution.
Until there is sufficient evidence otherwise, it must be assumed that ______.
the null hypothesis is true
A hypothesis that reflects the difference between groups but does NOT specify the direction of
the difference is a(an) ___ ___.
nondirectional research hypothesis
Which of the following represents a research hypothesis?
H1: X1 < X2
The null hypothesis refers to which of the following?
the population
"There is no difference in the weight between rats fed low-fiber diets and rats fed high-fiber
diets." This is an example of a(n) ______.
null hypothesis
, If you were to hypothesize that test scores from Classroom A will be higher than test scores
from Classroom B, you would have a ______.
directional research hypothesis
The term associated with identifying differences between groups that are NOT due to chance is
______.
significance
The level of risk that you are willing to take that the results you find are not due to the
treatment is expressed as which of the following?
significance level
There is always the possibility of error in statistics because the ______ is not directly tested.
population
When you reject the null hypothesis when there is actually no difference between groups, you
are making what kind of error?
Type I
When you accept the null hypothesis when the null hypothesis is false, you are making a
______.
Type II error
answers already passed
Which of the following techniques is used to generalize findings from the sample to the
population?
inferential statistics
What is the foundation of inferential statistics?
probability
Inferential statistics is based on the idea that the ______.
sample is representative of the population
The group you wish to generalize your results to is called the ______.
population
A representative sample allows you to generalize your results to a ______.
larger population
A sample is best defined as ______.
,a smaller group selected from a given population
Which of the following statements is TRUE of the normal curve?
Group of answer choices
Mean, median, and mode are the same.
The fact that the tails of a normal distribution never touch the horizontal axis relates to ______
property.
asymptotic
What is a sampling distribution in statistics?
The distribution of a statistic (e.g., mean or variance) calculated from multiple random samples
taken from a population.
What is the standard error in statistics?
A measure of the variability in a statistic due to random sampling.
When you collect a larger sample, the tendencies of the sample will:
Become more similar to those of the population
What does the Central Limit Theorem state in statistics?
,It states that as the sample size increases, the sampling distribution of the sample mean
approaches a normal distribution, regardless of the shape of the population distribution.
Until there is sufficient evidence otherwise, it must be assumed that ______.
the null hypothesis is true
A hypothesis that reflects the difference between groups but does NOT specify the direction of
the difference is a(an) ___ ___.
nondirectional research hypothesis
Which of the following represents a research hypothesis?
H1: X1 < X2
The null hypothesis refers to which of the following?
the population
"There is no difference in the weight between rats fed low-fiber diets and rats fed high-fiber
diets." This is an example of a(n) ______.
null hypothesis
, If you were to hypothesize that test scores from Classroom A will be higher than test scores
from Classroom B, you would have a ______.
directional research hypothesis
The term associated with identifying differences between groups that are NOT due to chance is
______.
significance
The level of risk that you are willing to take that the results you find are not due to the
treatment is expressed as which of the following?
significance level
There is always the possibility of error in statistics because the ______ is not directly tested.
population
When you reject the null hypothesis when there is actually no difference between groups, you
are making what kind of error?
Type I
When you accept the null hypothesis when the null hypothesis is false, you are making a
______.
Type II error
